X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=libraries%2Fliblutil%2Fpasswd.c;h=8cd6b1af484d93224541522b11533b1a9b12804e;hb=a26cca88ddf591e00ea7287e288fcbf56e08582b;hp=8c530828829454c190d47e082f0cc8401c0f3bb8;hpb=96a126e36af50dc692c8dfa829d90dcf640930e8;p=openldap diff --git a/libraries/liblutil/passwd.c b/libraries/liblutil/passwd.c index 8c53082882..8cd6b1af48 100644 --- a/libraries/liblutil/passwd.c +++ b/libraries/liblutil/passwd.c @@ -1,13 +1,16 @@ /* $OpenLDAP$ */ /* - * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved. + * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved. * COPYING RESTRICTIONS APPLY, see COPYRIGHT file */ /* - * lutil_password(credentials, password) + * int lutil_passwd( + * const struct berval *passwd, + * const struct berval *cred, + * const char **schemes ) * - * Returns true if user supplied credentials matches - * the stored password. + * Returns true if user supplied credentials (cred) matches + * the stored password (passwd). * * Due to the use of the crypt(3) function * this routine is NOT thread-safe. @@ -17,138 +20,228 @@ #include #include - #include #include -#include -#include +#ifdef SLAPD_SPASSWD +# ifdef HAVE_SASL_SASL_H +# include +# else +# include +# endif +#endif -#include "lutil_md5.h" -#include "lutil_sha1.h" -#include "lutil.h" +#ifdef SLAPD_KPASSWD +# include +# include +#endif + +/* KPASSWD/krb.h brings in a conflicting des.h so don't use both. + * configure currently requires OpenSSL to enable LMHASH. Obviously + * this requirement can be fulfilled by the KRB DES library as well. + */ +#if defined(SLAPD_LMHASH) && !defined(DES_ENCRYPT) +# include +#endif /* SLAPD_LMHASH */ + +#include + +#ifdef SLAPD_CRYPT +# include -#ifdef HAVE_SHADOW_H +# if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD ) +# ifdef HAVE_SHADOW_H # include -#endif -#ifdef HAVE_PWD_H +# endif +# ifdef HAVE_PWD_H # include +# endif +# ifdef HAVE_AIX_SECURITY +# include +# endif +# endif #endif -struct pw_scheme; +#include + +#include "ldap_pvt.h" +#include "lber_pvt.h" -typedef int (*PASSWD_CHK_FUNC)( - const struct pw_scheme *scheme, - const char *passwd, - const char *cred ); +#include "lutil_md5.h" +#include "lutil_sha1.h" +#include "lutil.h" -typedef char * (*PASSWD_GEN_FUNC) ( - const struct pw_scheme *scheme, - const char *passwd ); +static const unsigned char crypt64[] = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./"; + +#ifdef SLAPD_CRYPT +static char *salt_format = NULL; +#endif struct pw_scheme { - char *name; - size_t namelen; - PASSWD_CHK_FUNC chk_fn; - PASSWD_GEN_FUNC gen_fn; + struct berval name; + LUTIL_PASSWD_CHK_FUNC *chk_fn; + LUTIL_PASSWD_HASH_FUNC *hash_fn; +}; + +struct pw_slist { + struct pw_slist *next; + struct pw_scheme s; }; /* password check routines */ -static int chk_md5( - const struct pw_scheme *scheme, - const char *passwd, - const char *cred ); -static int chk_smd5( - const struct pw_scheme *scheme, - const char *passwd, - const char *cred ); +static LUTIL_PASSWD_CHK_FUNC chk_md5; +static LUTIL_PASSWD_CHK_FUNC chk_smd5; +static LUTIL_PASSWD_HASH_FUNC hash_smd5; +static LUTIL_PASSWD_HASH_FUNC hash_md5; -static int chk_ssha1( - const struct pw_scheme *scheme, - const char *passwd, - const char *cred ); -static int chk_sha1( - const struct pw_scheme *scheme, - const char *passwd, - const char *cred ); +#ifdef LUTIL_SHA1_BYTES +static LUTIL_PASSWD_CHK_FUNC chk_ssha1; +static LUTIL_PASSWD_CHK_FUNC chk_sha1; +static LUTIL_PASSWD_HASH_FUNC hash_sha1; +static LUTIL_PASSWD_HASH_FUNC hash_ssha1; +#endif -static int chk_crypt( - const struct pw_scheme *scheme, - const char *passwd, - const char *cred ); +#ifdef SLAPD_LMHASH +static LUTIL_PASSWD_CHK_FUNC chk_lanman; +static LUTIL_PASSWD_HASH_FUNC hash_lanman; +#endif -static int chk_unix( - const struct pw_scheme *scheme, - const char *passwd, - const char *cred ); +#ifdef SLAPD_NS_MTA_MD5 +static LUTIL_PASSWD_CHK_FUNC chk_ns_mta_md5; +#endif +#ifdef SLAPD_SPASSWD +static LUTIL_PASSWD_CHK_FUNC chk_sasl; +#endif -/* password generation routines */ -static char *gen_sha1( - const struct pw_scheme *scheme, - const char *passwd ); +#ifdef SLAPD_KPASSWD +static LUTIL_PASSWD_CHK_FUNC chk_kerberos; +#endif -static char *gen_ssha1( - const struct pw_scheme *scheme, - const char *passwd ); +#ifdef SLAPD_CRYPT +static LUTIL_PASSWD_CHK_FUNC chk_crypt; +static LUTIL_PASSWD_HASH_FUNC hash_crypt; -static char *gen_smd5( - const struct pw_scheme *scheme, - const char *passwd ); +#if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD ) +static LUTIL_PASSWD_CHK_FUNC chk_unix; +#endif +#endif -static char *gen_md5( - const struct pw_scheme *scheme, - const char *passwd ); +/* password hash routines */ -static char *gen_crypt( - const struct pw_scheme *scheme, - const char *passwd ); +#ifdef SLAPD_CLEARTEXT +static LUTIL_PASSWD_HASH_FUNC hash_clear; +#endif +static struct pw_slist *pw_schemes; -static const struct pw_scheme pw_schemes[] = +static const struct pw_scheme pw_schemes_default[] = { - { "{SSHA}", sizeof("{SSHA}")-1, chk_ssha1, gen_ssha1 }, - { "{SHA}", sizeof("{SHA}")-1, chk_sha1, gen_sha1 }, +#ifdef LUTIL_SHA1_BYTES + { BER_BVC("{SSHA}"), chk_ssha1, hash_ssha1 }, + { BER_BVC("{SHA}"), chk_sha1, hash_sha1 }, +#endif - { "{SMD5}", sizeof("{SMD5}")-1, chk_smd5, gen_smd5 }, - { "{MD5}", sizeof("{MD5}")-1, chk_md5, gen_md5 }, + { BER_BVC("{SMD5}"), chk_smd5, hash_smd5 }, + { BER_BVC("{MD5}"), chk_md5, hash_md5 }, -#ifdef SLAPD_CRYPT - { "{CRYPT}", sizeof("{CRYPT}")-1, chk_crypt, gen_crypt }, +#ifdef SLAPD_LMHASH + { BER_BVC("{LANMAN}"), chk_lanman, hash_lanman }, +#endif /* SLAPD_LMHASH */ + +#ifdef SLAPD_NS_MTA_MD5 + { BER_BVC("{NS-MTA-MD5}"), chk_ns_mta_md5, NULL }, +#endif /* SLAPD_NS_MTA_MD5 */ + +#ifdef SLAPD_SPASSWD + { BER_BVC("{SASL}"), chk_sasl, NULL }, +#endif + +#ifdef SLAPD_KPASSWD + { BER_BVC("{KERBEROS}"), chk_kerberos, NULL }, #endif -# if defined( HAVE_GETSPNAM ) \ - || ( defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD ) ) - { "{UNIX}", sizeof("{UNIX}")-1, chk_unix, NULL }, + +#ifdef SLAPD_CRYPT + { BER_BVC("{CRYPT}"), chk_crypt, hash_crypt }, +# if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD ) + { BER_BVC("{UNIX}"), chk_unix, NULL }, +# endif #endif #ifdef SLAPD_CLEARTEXT - /* psuedo scheme */ - { "{CLEARTEXT}", 0, NULL, NULL }, + /* pseudo scheme */ + { {0, "{CLEARTEXT}"}, NULL, hash_clear }, #endif - NULL, + { BER_BVNULL, NULL, NULL } }; +int lutil_passwd_add( + struct berval *scheme, + LUTIL_PASSWD_CHK_FUNC *chk, + LUTIL_PASSWD_HASH_FUNC *hash ) +{ + struct pw_slist *ptr; + + ptr = ber_memalloc( sizeof( struct pw_slist )); + if (!ptr) return -1; + ptr->next = pw_schemes; + ptr->s.name = *scheme; + ptr->s.chk_fn = chk; + ptr->s.hash_fn = hash; + pw_schemes = ptr; + return 0; +} + +void lutil_passwd_init() +{ + struct pw_slist *ptr; + struct pw_scheme *s; + + for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) { + if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn )) break; + } +} + +void lutil_passwd_destroy() +{ + struct pw_slist *ptr, *next; + + for( ptr=pw_schemes; ptr; ptr=next ) { + next = ptr->next; + ber_memfree( ptr ); + } +} + static const struct pw_scheme *get_scheme( const char* scheme ) { - int i; + struct pw_slist *pws; - for( i=0; pw_schemes[i].name != NULL; i++) { - if( pw_schemes[i].namelen == 0 ) continue; + if (!pw_schemes) lutil_passwd_init(); - if( strncasecmp(scheme, pw_schemes[i].name, - pw_schemes[i].namelen) == 0 ) - { - return &pw_schemes[i]; + for( pws=pw_schemes; pws; pws=pws->next ) { + if( strcasecmp(scheme, pws->s.name.bv_val ) == 0 ) { + return &(pws->s); } } return NULL; } +int lutil_passwd_scheme( + const char* scheme ) +{ + if( scheme == NULL ) { + return 0; + } + + return get_scheme(scheme) != NULL; +} + static int is_allowed_scheme( const char* scheme, @@ -166,17 +259,23 @@ static int is_allowed_scheme( return 0; } -static const char *passwd_scheme( +static struct berval *passwd_scheme( const struct pw_scheme *scheme, - const char* passwd, + const struct berval * passwd, + struct berval *bv, const char** allowed ) { - if( !is_allowed_scheme( scheme->name, allowed ) ) { + if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) { return NULL; } - if( strncasecmp( passwd, scheme->name, scheme->namelen ) == 0 ) { - return &passwd[scheme->namelen]; + if( passwd->bv_len >= scheme->name.bv_len ) { + if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) { + bv->bv_val = &passwd->bv_val[scheme->name.bv_len]; + bv->bv_len = passwd->bv_len - scheme->name.bv_len; + + return bv; + } } return NULL; @@ -187,143 +286,208 @@ static const char *passwd_scheme( */ int lutil_passwd( - const char *passwd, /* stored passwd */ - const char *cred, /* user cred */ + const struct berval *passwd, /* stored passwd */ + const struct berval *cred, /* user cred */ const char **schemes ) { - int i; + struct pw_slist *pws; - if (cred == NULL || passwd == NULL) { + if (cred == NULL || cred->bv_len == 0 || + passwd == NULL || passwd->bv_len == 0 ) + { return -1; } - for( i=0; pw_schemes[i].name != NULL; i++ ) { - if( pw_schemes[i].chk_fn ) { - const char *p = passwd_scheme( &pw_schemes[i], - passwd, schemes ); + if (!pw_schemes) lutil_passwd_init(); + + for( pws=pw_schemes; pws; pws=pws->next ) { + if( pws->s.chk_fn ) { + struct berval x; + struct berval *p = passwd_scheme( &(pws->s), + passwd, &x, schemes ); if( p != NULL ) { - return (pw_schemes[i].chk_fn)( &pw_schemes[i], p, cred ); + return (pws->s.chk_fn)( &(pws->s.name), p, cred ); } } } #ifdef SLAPD_CLEARTEXT if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) { - return strcmp( cred, passwd ); + return (( passwd->bv_len == cred->bv_len ) && + ( passwd->bv_val[0] != '{' /*'}'*/ )) + ? memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len ) + : 1; } -#else - return 1; #endif + return 1; +} + +struct berval * lutil_passwd_generate( ber_len_t len ) +{ + struct berval *pw; + + if( len < 1 ) return NULL; + + pw = ber_memalloc( sizeof( struct berval ) ); + if( pw == NULL ) return NULL; + + pw->bv_len = len; + pw->bv_val = ber_memalloc( len + 1 ); + + if( pw->bv_val == NULL ) { + ber_memfree( pw ); + return NULL; + } + + if( lutil_entropy( pw->bv_val, pw->bv_len) < 0 ) { + ber_bvfree( pw ); + return NULL; + } + + for( len = 0; len < pw->bv_len; len++ ) { + pw->bv_val[len] = crypt64[ + pw->bv_val[len] % (sizeof(crypt64)-1) ]; + } + pw->bv_val[len] = '\0'; + + return pw; } -char * lutil_passwd_generate( - const char * passwd, +struct berval * lutil_passwd_hash( + const struct berval * passwd, const char * method ) { const struct pw_scheme *sc = get_scheme( method ); if( sc == NULL ) return NULL; - if( ! sc->gen_fn ) return NULL; + if( ! sc->hash_fn ) return NULL; - return (sc->gen_fn)( sc, passwd ); + return (sc->hash_fn)( &sc->name, passwd ); } -static char * pw_string( - const struct pw_scheme *sc, - const char *passwd) +/* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */ +#if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT) +static struct berval * pw_string( + const struct berval *sc, + const struct berval *passwd ) { - size_t pwlen = strlen( passwd ); - char *pw = ber_memalloc( sc->namelen + pwlen + 1 ); - + struct berval *pw = ber_memalloc( sizeof( struct berval ) ); if( pw == NULL ) return NULL; - memcpy( pw, sc->name, sc->namelen ); - memcpy( &pw[sc->namelen], passwd, pwlen ); - pw[sc->namelen + pwlen] = '\0'; + pw->bv_len = sc->bv_len + passwd->bv_len; + pw->bv_val = ber_memalloc( pw->bv_len + 1 ); + + if( pw->bv_val == NULL ) { + ber_memfree( pw ); + return NULL; + } + + AC_MEMCPY( pw->bv_val, sc->bv_val, sc->bv_len ); + AC_MEMCPY( &pw->bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len ); + pw->bv_val[pw->bv_len] = '\0'; return pw; } +#endif /* SLAPD_LMHASH || SLAPD_CRYPT */ -static char * pw_string64( - const struct pw_scheme *sc, - const unsigned char *hash, size_t hashlen, - const unsigned char *salt, size_t saltlen ) +static struct berval * pw_string64( + const struct berval *sc, + const struct berval *hash, + const struct berval *salt ) { int rc; - char *string; + struct berval string; + struct berval *b64 = ber_memalloc( sizeof(struct berval) ); size_t b64len; - size_t len = hashlen + saltlen; - char *b64; - if( saltlen ) { + if( b64 == NULL ) return NULL; + + if( salt ) { /* need to base64 combined string */ - string = ber_memalloc( hashlen + saltlen ); + string.bv_len = hash->bv_len + salt->bv_len; + string.bv_val = ber_memalloc( string.bv_len + 1 ); - if( string == NULL ) { + if( string.bv_val == NULL ) { + ber_memfree( b64 ); return NULL; } - memcpy( string, hash, len ); - memcpy( &string[len], salt, saltlen ); - - len += saltlen; + AC_MEMCPY( string.bv_val, hash->bv_val, + hash->bv_len ); + AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val, + salt->bv_len ); + string.bv_val[string.bv_len] = '\0'; } else { - string = (char *) hash; + string = *hash; } - b64len = LUTIL_BASE64_ENCODE_LEN( len ) + 1; - b64 = ber_memalloc( b64len + sc->namelen ); + b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1; + b64->bv_len = b64len + sc->bv_len; + b64->bv_val = ber_memalloc( b64->bv_len + 1 ); - if( b64 == NULL ) { - if( saltlen ) ber_memfree( string ); + if( b64->bv_val == NULL ) { + if( salt ) ber_memfree( string.bv_val ); + ber_memfree( b64 ); return NULL; } - memcpy(b64, sc->name, sc->namelen); - - rc = lutil_b64_ntop( string, len, &b64[sc->namelen], b64len ); + AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len); - if( saltlen ) ber_memfree( string ); + rc = lutil_b64_ntop( + string.bv_val, string.bv_len, + &b64->bv_val[sc->bv_len], b64len ); + if( salt ) ber_memfree( string.bv_val ); + if( rc < 0 ) { - free( b64 ); + ber_bvfree( b64 ); return NULL; } + /* recompute length */ + b64->bv_len = sc->bv_len + rc; + assert( strlen(b64->bv_val) == b64->bv_len ); return b64; } /* PASSWORD CHECK ROUTINES */ +#ifdef LUTIL_SHA1_BYTES static int chk_ssha1( - const struct pw_scheme *sc, - const char* passwd, - const char* cred ) + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred ) { lutil_SHA1_CTX SHA1context; unsigned char SHA1digest[LUTIL_SHA1_BYTES]; - int pw_len = strlen(passwd); int rc; unsigned char *orig_pass = NULL; - - /* base64 un-encode password */ + + /* safety check */ + if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(SHA1digest)) { + return -1; + } + + /* decode base64 password */ orig_pass = (unsigned char *) ber_memalloc( (size_t) ( - LUTIL_BASE64_DECODE_LEN(pw_len) + 1) ); + LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) ); if( orig_pass == NULL ) return -1; - if ((rc = lutil_b64_pton(passwd, orig_pass, pw_len)) < 0) { + rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len); + + if (rc <= sizeof(SHA1digest)) { ber_memfree(orig_pass); - return 1; + return -1; } /* hash credentials with salt */ lutil_SHA1Init(&SHA1context); lutil_SHA1Update(&SHA1context, - (const unsigned char *) cred, strlen(cred)); + (const unsigned char *) cred->bv_val, cred->bv_len); lutil_SHA1Update(&SHA1context, (const unsigned char *) &orig_pass[sizeof(SHA1digest)], rc - sizeof(SHA1digest)); @@ -332,235 +496,823 @@ static int chk_ssha1( /* compare */ rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest)); ber_memfree(orig_pass); - return rc; + return rc ? 1 : 0; } static int chk_sha1( - const struct pw_scheme *sc, - const char* passwd, - const char* cred ) + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred ) { lutil_SHA1_CTX SHA1context; unsigned char SHA1digest[LUTIL_SHA1_BYTES]; - char base64digest[LUTIL_BASE64_ENCODE_LEN(sizeof(SHA1digest))+1]; + int rc; + unsigned char *orig_pass = NULL; + + /* base64 un-encode password */ + orig_pass = (unsigned char *) ber_memalloc( (size_t) ( + LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) ); + + if( orig_pass == NULL ) return -1; + rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len); + + if( rc != sizeof(SHA1digest) ) { + ber_memfree(orig_pass); + return -1; + } + + /* hash credentials with salt */ lutil_SHA1Init(&SHA1context); lutil_SHA1Update(&SHA1context, - (const unsigned char *) cred, strlen(cred)); + (const unsigned char *) cred->bv_val, cred->bv_len); lutil_SHA1Final(SHA1digest, &SHA1context); - - if (lutil_b64_ntop(SHA1digest, sizeof(SHA1digest), - base64digest, sizeof(base64digest)) < 0) - { - return 1; - } - - return strcmp(passwd, base64digest); + + /* compare */ + rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest)); + ber_memfree(orig_pass); + return rc ? 1 : 0; } +#endif static int chk_smd5( - const struct pw_scheme *sc, - const char* passwd, - const char* cred ) + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred ) { lutil_MD5_CTX MD5context; unsigned char MD5digest[LUTIL_MD5_BYTES]; - int pw_len = strlen(passwd); int rc; unsigned char *orig_pass = NULL; + /* safety check */ + if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(MD5digest)) { + return -1; + } + /* base64 un-encode password */ orig_pass = (unsigned char *) ber_memalloc( (size_t) ( - LUTIL_BASE64_DECODE_LEN(pw_len) + 1) ); + LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) ); if( orig_pass == NULL ) return -1; - if ((rc = lutil_b64_pton(passwd, orig_pass, pw_len)) < 0) { + rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len); + + if (rc <= sizeof(MD5digest)) { ber_memfree(orig_pass); - return 1; + return -1; } /* hash credentials with salt */ lutil_MD5Init(&MD5context); lutil_MD5Update(&MD5context, - (const unsigned char *) cred, strlen(cred)); + (const unsigned char *) cred->bv_val, + cred->bv_len ); lutil_MD5Update(&MD5context, - (const unsigned char *) &orig_pass[sizeof(MD5digest)], + &orig_pass[sizeof(MD5digest)], rc - sizeof(MD5digest)); lutil_MD5Final(MD5digest, &MD5context); /* compare */ rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest)); ber_memfree(orig_pass); - return rc; + return rc ? 1 : 0; } static int chk_md5( - const struct pw_scheme *sc, - const char* passwd, - const char* cred ) + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred ) { lutil_MD5_CTX MD5context; unsigned char MD5digest[LUTIL_MD5_BYTES]; - char base64digest[LUTIL_BASE64_ENCODE_LEN(sizeof(MD5digest))+1]; + int rc; + unsigned char *orig_pass = NULL; + + /* base64 un-encode password */ + orig_pass = (unsigned char *) ber_memalloc( (size_t) ( + LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) ); + + if( orig_pass == NULL ) return -1; + + rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len); + if ( rc != sizeof(MD5digest) ) { + ber_memfree(orig_pass); + return -1; + } + /* hash credentials with salt */ lutil_MD5Init(&MD5context); lutil_MD5Update(&MD5context, - (const unsigned char *)cred, strlen(cred)); + (const unsigned char *) cred->bv_val, + cred->bv_len ); + lutil_MD5Final(MD5digest, &MD5context); + + /* compare */ + rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest)); + ber_memfree(orig_pass); + return rc ? 1 : 0; +} + +#ifdef SLAPD_LMHASH +static int chk_lanman( + const struct berval *scheme, + const struct berval *passwd, + const struct berval *cred ) +{ + struct berval *hash; + + hash = hash_lanman( scheme, cred ); + return memcmp( &hash->bv_val[scheme->bv_len], passwd->bv_val, 32); +} +#endif /* SLAPD_LMHASH */ + +#ifdef SLAPD_NS_MTA_MD5 +static int chk_ns_mta_md5( + const struct berval *scheme, + const struct berval *passwd, + const struct berval *cred ) +{ + lutil_MD5_CTX MD5context; + unsigned char MD5digest[LUTIL_MD5_BYTES], c; + char buffer[LUTIL_MD5_BYTES + LUTIL_MD5_BYTES + 1]; + int i; + + /* hash credentials with salt */ + lutil_MD5Init(&MD5context); + lutil_MD5Update(&MD5context, + (const unsigned char *) &passwd->bv_val[32], + 32 ); + + c = 0x59; + lutil_MD5Update(&MD5context, + (const unsigned char *) &c, + 1 ); + + lutil_MD5Update(&MD5context, + (const unsigned char *) cred->bv_val, + cred->bv_len ); + + c = 0xF7; + lutil_MD5Update(&MD5context, + (const unsigned char *) &c, + 1 ); + + lutil_MD5Update(&MD5context, + (const unsigned char *) &passwd->bv_val[32], + 32 ); + lutil_MD5Final(MD5digest, &MD5context); - if ( lutil_b64_ntop(MD5digest, sizeof(MD5digest), - base64digest, sizeof(base64digest)) < 0 ) + for( i=0; i < sizeof( MD5digest ); i++ ) { + buffer[i+i] = "0123456789abcdef"[(MD5digest[i]>>4) & 0x0F]; + buffer[i+i+1] = "0123456789abcdef"[ MD5digest[i] & 0x0F]; + } + + /* compare */ + return memcmp((char *)passwd->bv_val, (char *)buffer, sizeof(buffer)) + ? 1 : 0; +} +#endif + +#ifdef SLAPD_SPASSWD +#ifdef HAVE_CYRUS_SASL +sasl_conn_t *lutil_passwd_sasl_conn = NULL; +#endif + +static int chk_sasl( + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred ) +{ + unsigned int i; + int rtn; + + for( i=0; ibv_len; i++) { + if(cred->bv_val[i] == '\0') { + return 1; /* NUL character in password */ + } + } + + if( cred->bv_val[i] != '\0' ) { + return 1; /* cred must behave like a string */ + } + + for( i=0; ibv_len; i++) { + if(passwd->bv_val[i] == '\0') { + return 1; /* NUL character in password */ + } + } + + if( passwd->bv_val[i] != '\0' ) { + return 1; /* passwd must behave like a string */ + } + + rtn = 1; + +#ifdef HAVE_CYRUS_SASL + if( lutil_passwd_sasl_conn != NULL ) { + int sc; +# if SASL_VERSION_MAJOR < 2 + const char *errstr = NULL; + sc = sasl_checkpass( lutil_passwd_sasl_conn, + passwd->bv_val, passwd->bv_len, + cred->bv_val, cred->bv_len, + &errstr ); +# else + sc = sasl_checkpass( lutil_passwd_sasl_conn, + passwd->bv_val, passwd->bv_len, + cred->bv_val, cred->bv_len ); +# endif + rtn = ( sc != SASL_OK ); + } +#endif + + return rtn; +} +#endif + +#ifdef SLAPD_KPASSWD +static int chk_kerberos( + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred ) +{ + unsigned int i; + int rtn; + + for( i=0; ibv_len; i++) { + if(cred->bv_val[i] == '\0') { + return 1; /* NUL character in password */ + } + } + + if( cred->bv_val[i] != '\0' ) { + return 1; /* cred must behave like a string */ + } + + for( i=0; ibv_len; i++) { + if(passwd->bv_val[i] == '\0') { + return 1; /* NUL character in password */ + } + } + + if( passwd->bv_val[i] != '\0' ) { + return 1; /* passwd must behave like a string */ + } + + rtn = 1; + +#ifdef HAVE_KRB5 /* HAVE_HEIMDAL_KRB5 */ + { +/* Portions: + * Copyright (c) 1997, 1998, 1999 Kungliga Tekniska H\xf6gskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + + krb5_context context; + krb5_error_code ret; + krb5_creds creds; + krb5_get_init_creds_opt get_options; + krb5_verify_init_creds_opt verify_options; + krb5_principal client, server; +#ifdef notdef + krb5_preauthtype pre_auth_types[] = {KRB5_PADATA_ENC_TIMESTAMP}; +#endif + + ret = krb5_init_context( &context ); + if (ret) { + return 1; + } + +#ifdef notdef + krb5_get_init_creds_opt_set_preauth_list(&get_options, + pre_auth_types, 1); +#endif + + krb5_get_init_creds_opt_init( &get_options ); + + krb5_verify_init_creds_opt_init( &verify_options ); + + ret = krb5_parse_name( context, passwd->bv_val, &client ); + + if (ret) { + krb5_free_context( context ); + return 1; + } + + ret = krb5_get_init_creds_password( context, + &creds, client, cred->bv_val, NULL, + NULL, 0, NULL, &get_options ); + + if (ret) { + krb5_free_principal( context, client ); + krb5_free_context( context ); + return 1; + } + + { + char *host = ldap_pvt_get_fqdn( NULL ); + + if( host == NULL ) { + krb5_free_principal( context, client ); + krb5_free_context( context ); + return 1; + } + + ret = krb5_sname_to_principal( context, + host, "ldap", KRB5_NT_SRV_HST, &server ); + + ber_memfree( host ); + } + + if (ret) { + krb5_free_principal( context, client ); + krb5_free_context( context ); + return 1; + } + + ret = krb5_verify_init_creds( context, + &creds, server, NULL, NULL, &verify_options ); + + krb5_free_principal( context, client ); + krb5_free_principal( context, server ); + krb5_free_cred_contents( context, &creds ); + krb5_free_context( context ); + + rtn = !!ret; + } +#elif defined(HAVE_KRB4) { - return 1; + /* Borrowed from Heimdal kpopper */ +/* Portions: + * Copyright (c) 1989 Regents of the University of California. + * All rights reserved. The Berkeley software License Agreement + * specifies the terms and conditions for redistribution. + */ + + int status; + char lrealm[REALM_SZ]; + char tkt[MAXHOSTNAMELEN]; + + status = krb_get_lrealm(lrealm,1); + if (status == KFAILURE) { + return 1; + } + + snprintf(tkt, sizeof(tkt), "%s_slapd.%u", + TKT_ROOT, (unsigned)getpid()); + krb_set_tkt_string (tkt); + + status = krb_verify_user( passwd->bv_val, "", lrealm, + cred->bv_val, 1, "ldap"); + + dest_tkt(); /* no point in keeping the tickets */ + + return status == KFAILURE; } +#endif - return strcmp(passwd, base64digest); + return rtn; } +#endif /* SLAPD_KPASSWD */ #ifdef SLAPD_CRYPT static int chk_crypt( - const struct pw_scheme *sc, - const char* passwd, - const char* cred ) + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred ) { - return strcmp(passwd, crypt(cred, passwd)); + char *cr; + unsigned int i; + + for( i=0; ibv_len; i++) { + if(cred->bv_val[i] == '\0') { + return 1; /* NUL character in password */ + } + } + + if( cred->bv_val[i] != '\0' ) { + return -1; /* cred must behave like a string */ + } + + if( passwd->bv_len < 2 ) { + return -1; /* passwd must be at least two characters long */ + } + + for( i=0; ibv_len; i++) { + if(passwd->bv_val[i] == '\0') { + return -1; /* NUL character in password */ + } + } + + if( passwd->bv_val[i] != '\0' ) { + return -1; /* passwd must behave like a string */ + } + + cr = crypt( cred->bv_val, passwd->bv_val ); + + if( cr == NULL || cr[0] == '\0' ) { + /* salt must have been invalid */ + return -1; + } + + return strcmp( passwd->bv_val, cr ) ? 1 : 0; } -# if defined( HAVE_GETSPNAM ) \ - || ( defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD ) ) +# if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD ) static int chk_unix( - const struct pw_scheme *sc, - const char* cred, - const char* p ) + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred ) { -# ifdef HAVE_GETSPNAM - struct spwd *spwd = getspnam(p); + unsigned int i; + char *pw,*cr; - if(spwd == NULL) { - return 1; /* not found */ + for( i=0; ibv_len; i++) { + if(cred->bv_val[i] == '\0') { + return -1; /* NUL character in password */ + } + } + if( cred->bv_val[i] != '\0' ) { + return -1; /* cred must behave like a string */ } - return strcmp(spwd->sp_pwdp, crypt(cred, spwd->sp_pwdp)); -# else - struct passwd *pwd = getpwnam(p); + for( i=0; ibv_len; i++) { + if(passwd->bv_val[i] == '\0') { + return -1; /* NUL character in password */ + } + } - if(pwd == NULL) { - return 1; /* not found */ + if( passwd->bv_val[i] != '\0' ) { + return -1; /* passwd must behave like a string */ } - return strcmp(pwd->pw_passwd, crypt(cred, pwd->pw_passwd)); + { + struct passwd *pwd = getpwnam(passwd->bv_val); + + if(pwd == NULL) { + return -1; /* not found */ + } + + pw = pwd->pw_passwd; + } +# ifdef HAVE_GETSPNAM + { + struct spwd *spwd = getspnam(passwd->bv_val); + + if(spwd != NULL) { + pw = spwd->sp_pwdp; + } + } # endif -# endif +# ifdef HAVE_AIX_SECURITY + { + struct userpw *upw = getuserpw(passwd->bv_val); + + if (upw != NULL) { + pw = upw->upw_passwd; + } + } +# endif + + if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) { + /* password must must be at least two characters long */ + return -1; + } + + cr = crypt(cred->bv_val, pw); + + if( cr == NULL || cr[0] == '\0' ) { + /* salt must have been invalid */ + return -1; + } + + return strcmp(pw, cr) ? 1 : 0; + } +# endif #endif -/* PASSWORD CHECK ROUTINES */ -static char *gen_ssha1( - const struct pw_scheme *scheme, - const char *passwd ) +/* PASSWORD GENERATION ROUTINES */ + +#ifdef LUTIL_SHA1_BYTES +static struct berval *hash_ssha1( + const struct berval *scheme, + const struct berval *passwd ) { lutil_SHA1_CTX SHA1context; unsigned char SHA1digest[LUTIL_SHA1_BYTES]; - unsigned char salt[4]; + unsigned char saltdata[4]; + struct berval digest; + struct berval salt; + + digest.bv_val = SHA1digest; + digest.bv_len = sizeof(SHA1digest); + salt.bv_val = saltdata; + salt.bv_len = sizeof(saltdata); - if( lutil_entropy( salt, sizeof(salt)) < 0 ) { + if( lutil_entropy( salt.bv_val, salt.bv_len) < 0 ) { return NULL; } lutil_SHA1Init( &SHA1context ); lutil_SHA1Update( &SHA1context, - (const unsigned char *)passwd, strlen(passwd) ); + (const unsigned char *)passwd->bv_val, passwd->bv_len ); lutil_SHA1Update( &SHA1context, - (const unsigned char *)salt, sizeof(salt) ); + (const unsigned char *)salt.bv_val, salt.bv_len ); lutil_SHA1Final( SHA1digest, &SHA1context ); - return pw_string64( scheme, - SHA1digest, sizeof(SHA1digest), - salt, sizeof(salt)); + return pw_string64( scheme, &digest, &salt); } -static char *gen_sha1( - const struct pw_scheme *scheme, - const char *passwd ) +static struct berval *hash_sha1( + const struct berval *scheme, + const struct berval *passwd ) { lutil_SHA1_CTX SHA1context; - unsigned char SHA1digest[20]; + unsigned char SHA1digest[LUTIL_SHA1_BYTES]; + struct berval digest; + digest.bv_val = SHA1digest; + digest.bv_len = sizeof(SHA1digest); lutil_SHA1Init( &SHA1context ); lutil_SHA1Update( &SHA1context, - (const unsigned char *)passwd, strlen(passwd) ); + (const unsigned char *)passwd->bv_val, passwd->bv_len ); lutil_SHA1Final( SHA1digest, &SHA1context ); - return pw_string64( scheme, - SHA1digest, sizeof(SHA1digest), - NULL, 0); + return pw_string64( scheme, &digest, NULL); } +#endif -static char *gen_smd5( - const struct pw_scheme *scheme, - const char *passwd ) +static struct berval *hash_smd5( + const struct berval *scheme, + const struct berval *passwd ) { lutil_MD5_CTX MD5context; - unsigned char MD5digest[16]; - unsigned char salt[4]; + unsigned char MD5digest[LUTIL_MD5_BYTES]; + unsigned char saltdata[4]; + struct berval digest; + struct berval salt; - if( lutil_entropy( salt, sizeof(salt)) < 0 ) { + digest.bv_val = MD5digest; + digest.bv_len = sizeof(MD5digest); + salt.bv_val = saltdata; + salt.bv_len = sizeof(saltdata); + + if( lutil_entropy( salt.bv_val, salt.bv_len) < 0 ) { return NULL; } lutil_MD5Init( &MD5context ); lutil_MD5Update( &MD5context, - (const unsigned char *) passwd, strlen(passwd) ); + (const unsigned char *) passwd->bv_val, passwd->bv_len ); lutil_MD5Update( &MD5context, - (const unsigned char *) salt, sizeof(salt) ); + (const unsigned char *) salt.bv_val, salt.bv_len ); lutil_MD5Final( MD5digest, &MD5context ); - return pw_string64( scheme, - MD5digest, sizeof(MD5digest), - salt, sizeof(salt) ); + return pw_string64( scheme, &digest, &salt ); } -static char *gen_md5( - const struct pw_scheme *scheme, - const char *passwd ) +static struct berval *hash_md5( + const struct berval *scheme, + const struct berval *passwd ) { lutil_MD5_CTX MD5context; - unsigned char MD5digest[16]; + unsigned char MD5digest[LUTIL_MD5_BYTES]; + + struct berval digest; + + digest.bv_val = MD5digest; + digest.bv_len = sizeof(MD5digest); lutil_MD5Init( &MD5context ); lutil_MD5Update( &MD5context, - (const unsigned char *) passwd, strlen(passwd) ); - + (const unsigned char *) passwd->bv_val, passwd->bv_len ); lutil_MD5Final( MD5digest, &MD5context ); - return pw_string64( scheme, - MD5digest, sizeof(MD5digest), - NULL, 0 ); + return pw_string64( scheme, &digest, NULL ); +; +} + +#ifdef SLAPD_LMHASH +/* pseudocode from RFC2433 + * A.2 LmPasswordHash() + * + * LmPasswordHash( + * IN 0-to-14-oem-char Password, + * OUT 16-octet PasswordHash ) + * { + * Set UcasePassword to the uppercased Password + * Zero pad UcasePassword to 14 characters + * + * DesHash( 1st 7-octets of UcasePassword, + * giving 1st 8-octets of PasswordHash ) + * + * DesHash( 2nd 7-octets of UcasePassword, + * giving 2nd 8-octets of PasswordHash ) + * } + * + * + * A.3 DesHash() + * + * DesHash( + * IN 7-octet Clear, + * OUT 8-octet Cypher ) + * { + * * + * * Make Cypher an irreversibly encrypted form of Clear by + * * encrypting known text using Clear as the secret key. + * * The known text consists of the string + * * + * * KGS!@#$% + * * + * + * Set StdText to "KGS!@#$%" + * DesEncrypt( StdText, Clear, giving Cypher ) + * } + * + * + * A.4 DesEncrypt() + * + * DesEncrypt( + * IN 8-octet Clear, + * IN 7-octet Key, + * OUT 8-octet Cypher ) + * { + * * + * * Use the DES encryption algorithm [4] in ECB mode [9] + * * to encrypt Clear into Cypher such that Cypher can + * * only be decrypted back to Clear by providing Key. + * * Note that the DES algorithm takes as input a 64-bit + * * stream where the 8th, 16th, 24th, etc. bits are + * * parity bits ignored by the encrypting algorithm. + * * Unless you write your own DES to accept 56-bit input + * * without parity, you will need to insert the parity bits + * * yourself. + * * + * } + */ + +static void lmPasswd_to_key( + const unsigned char *lmPasswd, + des_cblock *key) +{ + /* make room for parity bits */ + ((char *)key)[0] = lmPasswd[0]; + ((char *)key)[1] = ((lmPasswd[0]&0x01)<<7) | (lmPasswd[1]>>1); + ((char *)key)[2] = ((lmPasswd[1]&0x03)<<6) | (lmPasswd[2]>>2); + ((char *)key)[3] = ((lmPasswd[2]&0x07)<<5) | (lmPasswd[3]>>3); + ((char *)key)[4] = ((lmPasswd[3]&0x0F)<<4) | (lmPasswd[4]>>4); + ((char *)key)[5] = ((lmPasswd[4]&0x1F)<<3) | (lmPasswd[5]>>5); + ((char *)key)[6] = ((lmPasswd[5]&0x3F)<<2) | (lmPasswd[6]>>6); + ((char *)key)[7] = ((lmPasswd[6]&0x7F)<<1); + + des_set_odd_parity( key ); +} + +static struct berval *hash_lanman( + const struct berval *scheme, + const struct berval *passwd ) +{ + + int i; + char UcasePassword[15]; + des_cblock key; + des_key_schedule schedule; + des_cblock StdText = "KGS!@#$%"; + des_cblock hash1, hash2; + char lmhash[33]; + struct berval hash; + + for( i=0; ibv_len; i++) { + if(passwd->bv_val[i] == '\0') { + return NULL; /* NUL character in password */ + } + } + + if( passwd->bv_val[i] != '\0' ) { + return NULL; /* passwd must behave like a string */ + } + + strncpy( UcasePassword, passwd->bv_val, 14 ); + UcasePassword[14] = '\0'; + ldap_pvt_str2upper( UcasePassword ); + + lmPasswd_to_key( UcasePassword, &key ); + des_set_key_unchecked( &key, schedule ); + des_ecb_encrypt( &StdText, &hash1, schedule , DES_ENCRYPT ); + + lmPasswd_to_key( &UcasePassword[7], &key ); + des_set_key_unchecked( &key, schedule ); + des_ecb_encrypt( &StdText, &hash2, schedule , DES_ENCRYPT ); + + sprintf( lmhash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", + hash1[0],hash1[1],hash1[2],hash1[3],hash1[4],hash1[5],hash1[6],hash1[7], + hash2[0],hash2[1],hash2[2],hash2[3],hash2[4],hash2[5],hash2[6],hash2[7] ); + + hash.bv_val = lmhash; + hash.bv_len = 32; + + return pw_string( scheme, &hash ); } +#endif /* SLAPD_LMHASH */ #ifdef SLAPD_CRYPT -static char *gen_crypt( - const struct pw_scheme *scheme, - const char *passwd ) +static struct berval *hash_crypt( + const struct berval *scheme, + const struct berval *passwd ) { - static const unsigned char crypt64[] = - "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./"; + struct berval hash; + unsigned char salt[32]; /* salt suitable for most anything */ + unsigned int i; - char *hash = NULL; - unsigned char salt[2]; + for( i=0; ibv_len; i++) { + if(passwd->bv_val[i] == '\0') { + return NULL; /* NUL character in password */ + } + } + + if( passwd->bv_val[i] != '\0' ) { + return NULL; /* passwd must behave like a string */ + } - if( lutil_entropy( salt, sizeof(salt)) < 0 ) { + if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) { return NULL; } - salt[0] = crypt64[ salt[0] % (sizeof(crypt64)-1) ]; - salt[1] = crypt64[ salt[1] % (sizeof(crypt64)-1) ]; + for( i=0; i< ( sizeof(salt) - 1 ); i++ ) { + salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ]; + } + salt[sizeof( salt ) - 1 ] = '\0'; + + if( salt_format != NULL ) { + /* copy the salt we made into entropy before snprintfing + it back into the salt */ + char entropy[sizeof(salt)]; + strcpy( entropy, salt ); + snprintf( salt, sizeof(entropy), salt_format, entropy ); + } + + hash.bv_val = crypt( passwd->bv_val, salt ); - hash = crypt( passwd, salt ); + if( hash.bv_val == NULL ) return NULL; - if( hash = NULL ) return NULL; + hash.bv_len = strlen( hash.bv_val ); - return pw_string( scheme, hash ); + if( hash.bv_len == 0 ) { + return NULL; + } + + return pw_string( scheme, &hash ); } #endif + +int lutil_salt_format(const char *format) +{ +#ifdef SLAPD_CRYPT + free( salt_format ); + + salt_format = format != NULL ? strdup( format ) : NULL; +#endif + + return 0; +} + +#ifdef SLAPD_CLEARTEXT +static struct berval *hash_clear( + const struct berval *scheme, + const struct berval *passwd ) +{ + return ber_bvdup( (struct berval *) passwd ); +} +#endif +